“People who don’t like being criticized are often going to be open about that fact”
[Just responding to this narrow point and not the comment as a whole, which contains plenty of things I agree with.]
Fwiw, I don’t think this is true in this community. Disliking criticism is a bad look and seeming responsive to criticism is highly valued. I’ve seen lots of situations up close where it would have been very aversive/costly for someone to say “I totally disagree with this criticism and think it wasn’t useful” and very tempting for someone to express lots of gratitude for criticism and change in response to it whether or not it was right. I think it’s not uncommon for the former to take more bravery than the latter and I personally feel unsure whether I’ve felt more bias towards agreeing with criticism that was wrong or disagreeing with criticism that was right.
Hey! You might be interested in this forum post on suicide hotlines from a while back. https://forum.effectivealtruism.org/posts/Xh5oyGkngGjCmNhcP/how-impactful-is-being-a-suicide-hotline-volunteer
Unfortunately, I think the comments in the post (including one from a former volunteer) make a really compelling case that it takes a lot more than 5 hours to prevent a suicide. I think it takes at least hundreds and probably thousands of hours of calls.